The technical educator

4.11 - 1251 ratings - Source

... call-bell, xf- The connections at both stations being those shown in the diagram
, he depresses the key, t, thns breaking contact ... The gauge of the wire and the
number of turns of it on ths coil are points that depend upon the resistance of the
anbsp;...

Title

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The technical educator

Author

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Publisher

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- 1872

ISBN-13

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